Nerd is a term that refers to an intelligent but single-minded person obsessed with a nonsocial hobby or pursuit. Nerds are generally considered to be awkward, shy and/or unattractive by most, although this is not always true. Thus, a nerd is often excluded from physical activity and considered a loner by others, or will tend to associate with a small group of like-minded people, although again, this is not always the case.